1. Radio waves
As the name suggests, radio waves are emitted by radio stations, TV stations, and cellphone towers. They have a wavelength range of 1-105 meters.
2. Microwaves
Microwaves are used to broadcast information through space as they can penetrate through clouds and light rain. They are also used to heat food, which led to the invention of the microwave oven.
3. Infrared
Infrared radiation is thermal radiation that carries heat. They are used in many infrared devices and remote sensing for weather conditions.
4. Visible Light
Light is the only part of the electromagnetic spectrum that is visible to the human eye. The eye perceives light as a combination of several colors of different wavelengths. Light is made up of seven colors – violet, indigo, blue, green, yellow, orange, and red.
5. Ultraviolet
Ultraviolet light is emitted by the sun and is responsible for sunburn. They are used in “black lights” that make objects glow.
6. X-rays
X-rays are used for medical purposes. They can penetrate through the skin and tissue and reveal a detailed structure of the interior.
7. Gamma Rays
Distant astronomical bodies emit high energy gamma rays. They are also produced in the laboratory by bombarding subatomic particles with protons and neutrons and during a nuclear explosion.
